Vascular tube



FIG. 1 is a perspective view of a vascular tube showing our new design.

FIG. 2 is a side elevation view of the side opposite shown in FIG. 1.

FIG. 3 is an end elevation thereof; and,

FIG. 4 is an end elevation of the end opposite that shown in FIG. 3. 

The ornamental design for a vascular tube, as shown. 